An approach to the shape optimum design of superconducting synchronous generator

A Superconducting synchronous generator(SSG) is characterized by an air-cor ed machine with its rotor iron and stator iron teeth removed. For this reas on, in the case of the shape optimum design of SSG, other design variables different from an iron-cored machine should be considered, which will lead to substantial improvement on the performance. The major design variables t hat are considered by using 3D Finite Element Method(FEM) in this paper are : 1) field coil width, 2) axial length of magnetic shield, and 3) armature winding method, End-ring of armature winding is considered in the calculat ion of EMF. When it comes to field coil width, as field coil width enlarges , its effective field increases but the maximum field on the superconductor decreases, This determines the critical current density. This study presen ts an effective field coil width, axial length of magnetic shield, and arma ture winding method, and also the analysis is verified by the experimental results.